I get the message "this search engine is not supported by Firefox and cannot be installed" whenever I try to install a plugin to search on the Mozilla Add-ons site. Why?

Any search plugin I chose to install it from the list of search plugins FireFox on the Mozilla Add-ons site, I get the same error message - "this search engine is not supported by FireFox and can not be installed. I tried to delete the 3 files in my profile identified in the article on troubleshooting plugins, but it did not help. I am running Firefox with administrator privileges, but it does not help. The problem seems to be with the search plugins. I can install other extensions that are not plugins from the Mozilla Add-ons site search, but not the search plugins. I tried restarting FireFox and restarting the computer severaltimes, but I get the same error message when I try to install a search plugin.

Something is messed up on the pages of plugins MySapce AMO. Clear the URL bar and type something here (but do not hit Enter) - then you should be able to proceed with the installation of a search plugin.

Tags: Firefox

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